CHANGELOG.md in opencensus-stackdriver-0.1.1 vs CHANGELOG.md in opencensus-stackdriver-0.1.2

@@ -1,6 +1,10 @@
 # Release History
 
+### 0.1.2 / 2018-05-22
+
+* Add agent identifier and version attribute to reported spans.
+
 ### 0.1.1 / 2018-04-13
 
 * Clean unneeded files from the gem
 * Do not issue a write request for an empty span list (bogdanap)